110 lines
3.6 KiB
C++
110 lines
3.6 KiB
C++
// Filename: vertexDataBuffer.h
|
|
// Created by: drose (14May07)
|
|
//
|
|
////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PANDA 3D SOFTWARE
|
|
// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
|
|
//
|
|
// All use of this software is subject to the terms of the Panda 3d
|
|
// Software license. You should have received a copy of this license
|
|
// along with this source code; you will also find a current copy of
|
|
// the license at http://etc.cmu.edu/panda3d/docs/license/ .
|
|
//
|
|
// To contact the maintainers of this program write to
|
|
// panda3d-general@lists.sourceforge.net .
|
|
//
|
|
////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef VERTEXDATABUFFER_H
|
|
#define VERTEXDATABUFFER_H
|
|
|
|
#include "pandabase.h"
|
|
#include "vertexDataBook.h"
|
|
#include "vertexDataBlock.h"
|
|
#include "pointerTo.h"
|
|
#include "virtualFile.h"
|
|
#include "pStatCollector.h"
|
|
#include "pmutex.h"
|
|
#include "mutexHolder.h"
|
|
|
|
////////////////////////////////////////////////////////////////////
|
|
// Class : VertexDataBuffer
|
|
// Description : A block of bytes that stores the actual raw vertex
|
|
// data referenced by a GeomVertexArrayData object.
|
|
//
|
|
// At any point, a buffer may be in any of two states:
|
|
//
|
|
// independent - the buffer's memory is resident, and
|
|
// owned by the VertexDataBuffer object itself (in
|
|
// _resident_data).
|
|
//
|
|
// paged - the buffer's memory is owned by a
|
|
// VertexDataBlock. That block might itself be
|
|
// resident, compressed, or paged to disk. If it is
|
|
// resident, the memory may still be accessed directly
|
|
// from the block. However, this memory is considered
|
|
// read-only.
|
|
//
|
|
// VertexDataBuffers start out in independent state.
|
|
// They get moved to paged state when their owning
|
|
// GeomVertexArrayData objects get evicted from the
|
|
// _independent_lru. They can get moved back to
|
|
// independent state if they are modified
|
|
// (e.g. get_write_pointer() or realloc() is called).
|
|
//
|
|
// The idea is to keep the highly dynamic and
|
|
// frequently-modified VertexDataBuffers resident in
|
|
// easy-to-access memory, while collecting the static
|
|
// and rarely accessed VertexDataBuffers together onto
|
|
// pages, where they may be written to disk as a block
|
|
// when necessary.
|
|
////////////////////////////////////////////////////////////////////
|
|
class EXPCL_PANDA_GOBJ VertexDataBuffer {
|
|
public:
|
|
INLINE VertexDataBuffer();
|
|
INLINE VertexDataBuffer(size_t size);
|
|
INLINE VertexDataBuffer(const VertexDataBuffer ©);
|
|
void operator = (const VertexDataBuffer ©);
|
|
INLINE ~VertexDataBuffer();
|
|
|
|
INLINE const unsigned char *get_read_pointer(bool force) const;
|
|
INLINE unsigned char *get_write_pointer();
|
|
|
|
INLINE size_t get_size() const;
|
|
INLINE void clean_realloc(size_t size);
|
|
INLINE void unclean_realloc(size_t size);
|
|
INLINE void clear();
|
|
|
|
INLINE void page_out(VertexDataBook &book);
|
|
|
|
INLINE void swap(VertexDataBuffer &other);
|
|
|
|
private:
|
|
void do_clean_realloc(size_t size);
|
|
void do_unclean_realloc(size_t size);
|
|
|
|
void do_page_out(VertexDataBook &book);
|
|
void do_page_in();
|
|
|
|
unsigned char *_resident_data;
|
|
size_t _size;
|
|
PT(VertexDataBlock) _block;
|
|
Mutex _lock;
|
|
|
|
public:
|
|
static TypeHandle get_class_type() {
|
|
return _type_handle;
|
|
}
|
|
static void init_type() {
|
|
register_type(_type_handle, "VertexDataBuffer");
|
|
}
|
|
|
|
private:
|
|
static TypeHandle _type_handle;
|
|
};
|
|
|
|
#include "vertexDataBuffer.I"
|
|
|
|
#endif
|